Pendttltjm-cohtbolled sight



7 1927. June R. KAUCH PENDULUM CONTROLLED SIGHT Filed Feb. 13. 1923 A TTORNEYS.

Fatented June 7, 1927.

STATES ROBERT MUCH, OF DAYTON, OHIO.

PEND'ULUM-CONTROLLED SIGHT.

Application filed February 13, 1923. Serial No. 618,822.

This invention relates in general to a stabilizing device and more particularly to a stabilizing device such as is adapted to stabilize sights, cameras, guns or other devices which-are mounted on bases such as aircraft, naval vessels, and mobile artillery carriers.

Due to the fact that all of the abovenamed movable bases are constantly being moved out of the horizontal, some such stabilization is needed. Due to the fact that the lead necessary to cause a bullet to strike a target upon the ground when firing from an airplane by cannon, varies accordingly to the Variance of the longitudinal flying position of the airplane, it is necessary to correspondingly vary the axis of the gun barrel a proportionate amount to compensate for variations of the longitudinal axis of the airplane out of the horizontal.

It is the object of my invention to provide means for automatically compensating a sighting device or similar device against motion of its mobile base as, for instance, in

the case of aircraft, to compensate for motion of the longitudinal axis out of the horizontal, by the provision of a suitably damped pendulum so arranged as to provide the proportionate compensation necessary.

A complete disclosure of my invention will be found in the accompanying specification and claims and will be illustrated in one embodiment in the accompanying drawings, in which:

Fig. 1 is a side elevation of my device with portions broken away for the sake of clarity.

Fig. 2 is an end elevation of my device with portions broken away.

Fig. 3 is a perspective of my operating mechanism.

Referring with greater particularity to the drawings, the sight or other mechanism 1 is provided with suitable yokes 2"and 3 for mounting. The yoke 2 is adapted to be securedv by screws 1 to the. side mounting base 5 whlch is hingedly mounted, by means of brackets 6 and 7 and pin 8, onthe compensating mounting base 9. This number is secured by means of screws 10 to a longron 11 of the aircraft or any similar suitable member of any mobile base."

- The yoke 3 is pivotally connected at 12 to a rack 13 which bears in a rack guide 14.

Rack guide 14 is pivotally mounted on a pinion shaft 15 which is supported in suitable bearings in brackets 16 from the other end of base 9. A

The rack 13 is adapted to mesh with a small spur gear 17 also mounted on pinion shaft 15. The other end of pinion shaft 15 extends into a'gear housing 18, which is secured by screws 19 to the inner sidewall of an oil well 20, and has mounted upon it a large spur gear 21.

Spur gear 21 is adapted to mesh with another smaller spur gear 22 mounted on pendulum fulcrum shaft 23 which bears in both side walls of the oil well and in the gear housing casing. A pendulum fulcrum block 2 1 is mounted on shaft 23midway between the side walls of the oil well and is adapted to receive pendulum arm 25 of a pendulum 26. The pendulum 26 is provided at its lower portion with a mercury cup 27 and damping'vanes 28.

The oil well is provided with an opening 29 for filling the same with oil for damping the motion of the pendulum.

From the foregoing, my device will be seen to operate as follows.

The motion of the longron 11 out of, the horizontal, downwardly let us say, will cause the gear 22 as viewed'in Fig. 1-to transmit rotational movement to the gear 21 at a speed inversely proportional to the sizes of the ears and in a counter-clockwise direction. he gear 21 will cause the shaft 15 to rotate the gear 17 at the same rate of rotation, but, due to the smaller size of gear 17 a reduced movement of the rack 13 in an upward direction will result. The upward movement of rack 13 will raise the forward end of the gun side mounting base 5 and sired.

It is'by no means intended that this compensating and stabilizing device shall be limited to the use of stabilizing-this particular type of sight on this part1cular type of 've the proper relative elevation of the sight demobile base, but it is intended to cover the stabilization of any sight which may be so mounted.

I claim: 1. In a device of the character described, a mobile base, a sight member pivotally mounted on said base, a pendulum whose motion relative to said base is adapted to move said sight member to control the angular relation of said sight to said mobile base, and reduction gear means between said pendulum and said sight member controlling the degree of movement of the pen- Icolulum to be transmitted to said sight mem- 2. In a device of the character described, a mobile base, a sight member pivotally mounted near one end upon said mobile base, a running connection between the mobile base and said sight member near its other end and (pendulum operated means connected to sa1 sighting member by a reduction gear mechanism and controlling the relative angular relation between said sight member and said mobile base.

3. In a device of the character described, a mobile base, asight member pivotally mounted near one end upon said mobile base, means slidably mounting said sight member near its other ,end on said base, a pendulum, and means operatively connecting said sight member to saidpendulum a mobile base, a sight member through said slidable means to control the angular relation between said mobile base in said sight member upon tipping of said ase.

4. In a device of the character described, a mobile base, a sight member ivotally mounted near one end upon said mobile base, a running connection between the mobile base and said sight member near its other end, a pendulum whose movement relative to said base is adapted to move said sight member through said running connection to control the angular relation between said mobile. base and said sight member, and reduction gear means connected to and interposed between said pendulum and said runmng connection controlling the degree of movement of said pendulum transmitted to said sight member.

5. In a device of the character described,

ivotally mounted near one end upon said mobile base, a rack pivotally mounted on said sight member near its other end, a pendulum provided with means for damping its movement, and reduction gear means between said pendulum and said rack for transmitting relative mot-ion from said pendulum to said sight member upon the tipping of said base.

In testimony whereofl aflix my si ature.

ROBERT KA CH. 

